{"id":"DEBIAN-CVE-2021-46992","details":"In the Linux kernel, the following vulnerability has been resolved:  netfilter: nftables: avoid overflows in nft_hash_buckets()  Number of buckets being stored in 32bit variables, we have to ensure that no overflows occur in nft_hash_buckets()  syzbot injected a size == 0x40000000 and reported:  UBSAN: shift-out-of-bounds in ./include/linux/log2.h:57:13 shift exponent 64 is too large for 64-bit type 'long unsigned int' CPU: 1 PID: 29539 Comm: syz-executor.4 Not tainted 5.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace:  __dump_stack lib/dump_stack.c:79 [inline]  dump_stack+0x141/0x1d7 lib/dump_stack.c:120  ubsan_epilogue+0xb/0x5a lib/ubsan.c:148  __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:327  __roundup_pow_of_two include/linux/log2.h:57 [inline]  nft_hash_buckets net/netfilter/nft_set_hash.c:411 [inline]  nft_hash_estimate.cold+0x19/0x1e net/netfilter/nft_set_hash.c:652  nft_select_set_ops net/netfilter/nf_tables_api.c:3586 [inline]  nf_tables_newset+0xe62/0x3110 net/netfilter/nf_tables_api.c:4322  nfnetlink_rcv_batch+0xa09/0x24b0 net/netfilter/nfnetlink.c:488  nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:612 [inline]  nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:630  netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]  netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338  netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927  sock_sendmsg_nosec net/socket.c:654 [inline]  sock_sendmsg+0xcf/0x120 net/socket.c:674  ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350  ___sys_sendmsg+0xf3/0x170 net/socket.c:2404  __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433  do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46","modified":"2026-09-15T09:02:34.975952184Z","published":"2024-02-28T09:15:37.833Z","upstream":["CVE-2021-46992"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2021-46992"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.10.38-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-46992.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.10.38-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-46992.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.10.38-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-46992.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"}]}